\begin{tabular}{lcccc} \hline
 & (1) & (2) & (3) & (4) \\
VARIABLES & linstall\_percDS1 & linstall\_percDS1 & linstall\_percDS1 & linstall\_percDS1 \\ \hline
 &  &  &  &  \\
price &  & 24.96*** & 24.69*** &  \\
 &  & (0.379) & (0.373) &  \\
A\_t &  & 0.000982*** & 0.000990*** &  \\
 &  & (1.39e-05) & (1.37e-05) &  \\
kwh\_ben & 3.36e-05*** & 5.44e-05*** &  &  \\
 & (2.03e-06) & (2.21e-06) &  &  \\
cost & -7.65e-05*** & -3.09e-05*** & -1.45e-05*** & -1.45e-05*** \\
 & (4.14e-06) & (4.24e-06) & (4.32e-06) & (4.32e-06) \\
cost\_ben & 1.99e-05*** & 2.08e-05*** &  &  \\
 & (2.27e-06) & (2.33e-06) &  &  \\
unit\_ben & 1.68e-05*** & 1.89e-05*** &  &  \\
 & (4.57e-06) & (4.55e-06) &  &  \\
CollPerc\_t & 1.365*** & 1.454*** & 1.460*** &  \\
 & (0.0516) & (0.0519) & (0.0518) &  \\
Pol\_t & -0.142** & 0.186*** & 0.144** &  \\
 & (0.0705) & (0.0719) & (0.0709) &  \\
price\_ben & 0.000276*** &  &  &  \\
 & (2.78e-06) &  &  &  \\
skwh &  &  & 5.826*** &  \\
 &  &  & (0.212) &  \\
scost &  &  & 0.651*** &  \\
 &  &  & (0.0536) &  \\
sunit &  &  & 0.000769*** &  \\
 &  &  & (7.56e-05) &  \\
price\_std &  &  &  & 0.670*** \\
 &  &  &  & (0.0101) \\
A\_t\_std &  &  &  & 0.672*** \\
 &  &  &  & (0.00929) \\
skwh\_std &  &  &  & 0.274*** \\
 &  &  &  & (0.00995) \\
scost\_std &  &  &  & 0.123*** \\
 &  &  &  & (0.0101) \\
sunit\_std &  &  &  & 0.0980*** \\
 &  &  &  & (0.00964) \\
CollPerc\_t\_std &  &  &  & 0.288*** \\
 &  &  &  & (0.0102) \\
Pol\_t\_std &  &  &  & 0.0224** \\
 &  &  &  & (0.0111) \\
Constant & -11.18*** & -17.23*** & -17.78*** & -17.78*** \\
 & (0.117) & (0.150) & (0.152) & (0.152) \\
 &  &  &  &  \\
Observations & 41,776 & 41,776 & 41,776 & 41,776 \\
 R-squared & 0.440 & 0.453 & 0.459 & 0.459 \\ \hline
\multicolumn{5}{c}{ Robust standard errors in parentheses} \\
\multicolumn{5}{c}{ *** p$<$0.01, ** p$<$0.05, * p$<$0.1} \\
\end{tabular}
